HS Code 41.04 – Tanned or crust hides and skins of bovine (including buffalo) or equine animals, without hair on, whether or not split, but not further prepared

HS code 4104 is a 4-digit heading in the Harmonized System that covers: Tanned or crust hides and skins of bovine (including buffalo) or equine animals, without hair on, whether or not split, but not further prepared. Heading 4104 encompasses tanned or crust hides and skins derived from bovine animals (including buffalo) and equine animals. The critical defining characteristic is that these hides and skins are without hair on, whether or not they have been split, but importantly, they are 'not further prepared.' This means they have undergone the initial tanning process, which converts raw hides into a stable material, and may have been dried to a 'crust' state. Crust leather is essentially semi-finished leather; it has been tanned, shaved, and retanned, but not yet dyed, finished, or embossed for specific end-use applications. This classification is crucial for international trade as it represents a significant intermediate stage in the leather manufacturing supply chain. It acts as a bridge between the raw material (Chapter 4101) and fully finished leather (Chapter 4107). Importers and exporters must meticulously distinguish between crust leather and raw hides (which require further processing like tanning) or fully finished leather (which is ready for product manufacturing). The 'not further prepared' clause is paramount for compliance, dictating that goods under this heading should not exhibit characteristics of finished leather such as specific colors beyond natural tanning, specialized coatings, or embossed patterns. This heading facilitates trade in large volumes of semi-processed leather, allowing different stages of production to occur in various countries based on expertise, labor costs, or environmental regulations. Its historical significance lies in enabling global specialization within the leather industry, where tanning may occur in one region and high-value finishing in another. Accurate classification here prevents costly delays, duties discrepancies, and potential penalties.

Crust bovine side leather, crust buffalo hide, wet blue bovine hides, crust horsehide, split crust bovine leather, full grain crust cowhide, corrected grain crust buffalo leather, vegetable-tanned crust bovine leather, chrome-tanned crust equine leather, natural crust leather rolls, semi-processed bovine back leather, unfinished buffalo saddle leather, crust automotive upholstery blanks, crust footwear upper leather, crust bag leather, crust belt leather, crust garment leather, crust furniture leather, crust industrial leather, raw edge crust leather, unsplit crust bovine leather, pre-split crust bovine leather, re-tanned crust bovine leather, dried crust bovine leather, uncolored crust bovine leather

A common misclassification error involves confusing crust leather (4104) with raw hides (4101) or fully finished leather (4107). Raw hides (4101) are unprocessed and require tanning, while crust leather has already undergone the tanning process. Finished leather (4107) has been dyed, coated, or otherwise prepared for immediate use in manufacturing products, which is explicitly excluded by 'not further prepared' in 4104. For instance, a trader might mistakenly classify a natural-colored, dry tanned hide as finished leather if it's visually appealing, missing the crucial distinction of its unfinished state. This difference in processing stage significantly impacts duties and regulations.

In 2025, the top exporters of HS code 4104 in UN Comtrade data were Brazil ($523M, 21% of world exports), the United States ($393M) and Italy ($272M). World exports came to about $2.5B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.

In 2025, the top importers of HS code 4104 in UN Comtrade data were China ($760M, 26% of world imports), Italy ($484M) and Vietnam (about $429M). World imports came to about $2.9B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.

HS code 4104 is a 4-digit heading under Chapter 41 of the Harmonized System. The first 2 digits (41) identify the chapter, and digits 3-4 (04) specify the heading. This code contains multiple 6-digit subheadings for precise product classification.